Well-tool placing and hoisting implement



Jan. 16, 1923. r

J. C. STOKES. WELL TOOL PLACING AND Housnue lMPLEMENT.

2 SHEE'TSFSHEET l- FILED APR. 22. 192].

John 1: SC k Jan. 16, 1923. 1,442,188.

1,0. STOKES. v WELL TOOL PLACING AND HOISTING IMPLEMENT.

FILED APR. 22, 1-921- 2 SHEETS-SHEET 2- FTE.I :1. I 7 J1"; ,EL

Patented Jan. 16, 1923.

PATENT OFFICE.

JOHN C. STOKES, OF SHREVEPORT, LOUISIAN WELL-TOOL PLACING AND HOISTING IMPLEMENT.

Application filed April 22, 1921.

aerial No. 380,371, and Aug. 17, 1920, Serial No. 404,204, in and from drill stems and well casings, and the primary object of-the invention is to provide a grapple, for raising and lowering the tools and well appliances, having a novel means for permitting the releasing of the tools and appliances, when the same are lowered to their desired positions or when the same become stuck in the drill stem .or well casing.

Another object of the invention is to provide a well tool or appliance engaging grapple or overshot having pivoted jaws for engaging the tool-or appliance, and means for permitting the instant releasing of the jaws from the tool or appliance, when so desired, irrespective of the position of thetool or appliance in the drill stem or well casing.

A further object of the invention is the provision of a well tool placing and hoisting implement embodying pivoted jaws for engaging the drill or other well appliance, the

jaws being constructed for normally engaging the tool or appliance and having extended arms, which are adapted to be engaged by a sleeve mounted on the hoisting or low- 40 being adapted to actuate the arms for moving the jaws from out ofengagement with the tool or other well appliance, thereby permitting the releasing thereof at any desired point.

the invention consists in the novel'construction, arrangement and formation of parts, as will be hereinafter more specifically described, claimed and illustrated in them- (-ompanying drawings, forming a part of this specification, in which drawings:

Figure 1 is a vertical longitudinal section through a drill and underreamer showing ering cable of the implement, the sleeve \Vith these and other objects in view,-

Serial No. 463,538.

the improved grapple or overshot in operative position for raising the drill bit and carrier from the drill holder or stem, portions of the improved grapple or overshot being shown in section. 1

Figure 2 is a fragmentary sectional view through the drill stem, showing the improved grapple therein, parts thereof being shown 1n section and illustrating the position of the tool or other well appliance engaging jaws and the operating sleeve thereof, when the jaws are in their released position, the operating sleeve for the jaws being shown in section.

Figure 3 is anelevation of the improved overshot or well tool placing and hoisting implement, the upper end thereof being shown in section.

Figure 4 is a detail section taken on the line 44 of Figure 1.

Figure 5 is a bottom plan view of the overshot or well tool placing and hoisting implement. a

Figure 6 is a vertical longitudinal section through the drilhstem, illustrating the drill bit and carrier therein, and showing a modified type of overshot or well tool placing or hoisting implement connected. thereto for raising the same out of the drill stem.

Figure 7 is a fragmentary vertical section through the drill stem, illustrating the overshot or drill tool placing or hoisting implement in its released position, and out of engagement with the drill bit carrier.

Figure 8 is a view similar to Figure 7, illustrating the position of the jaws of the well too] placing or hoisting implement, prior to the lowering of the implement into engagement with the bit carrier, and

Figure 9 is a detailcross section taken on the line 9-9 of Figure 7.

Referring to the drawings in detail wherein similar reference characters designate corresponding partsthroughout the several views, the letter A indicates the improved well tool placing and hoisting implement, and B, the drill with which it is shown.

The drill B, which forms the subject matter of my pending application, Serial No. 404,204, filed Aug. 17, 1920, forms no partof the present invention, and has been merely shown for thepurposev of illustratingthe use of the implement A, and a brief description thereof only will be here given. As

though the same is not restricted to such use. It is also to be understood that the improved implement A can be used for raising orlowering any type of drill or well appliance. The carrier 12 includes the enlarged cylindrical body 13 having an annular shoulder 14, which is adapted to seat upon the internal shoulder 15 of the stem 10, and the depending removable legs 16 to which the blades 17 of the bit 11 are slidably and pivotally attached by means of the bolt 18. The legs 16 are provided with any preferred type of waterways 19 for washing the debris away from the bit blades and the bolt 18, and to prevent the'passage of the cleaning fluid between the bit carrier and the stem, the. expansion rings 20 are provided. The upper end of the bit carrier 12 has attached thereto at its axial center a stem 21, which is provided with a head 22, which as shown is of conical configuration. This head forms the means by which the bit carrier and bit blades may be raised or lowered. v

The improved tool placing and hoisting implement includes a solid cylindrical body 23, and the lower end of the same is bifurcated as at24 for the reception of a pair of dogs 25. The bifurcated lower end of the solid body 23 is also provided with a bore 26 in which the conical head 22 is adapted to be received and the jaws 25 are adapted to normally extend into said bore so as to graspthe' head. In order to center the solid'cylindrical body 23 in relation to the head 22 and to facilitate the positioning of the head 22 within the bore 26, the extreme lower edge of the bore has its inner surface bevelled or flared as at 27. The dogs 25 include right angularly positioned arms 28 and 29 and the arms of the dogs cross each other, and the arms 29 of the dogs have their free terminals extended slightly beyond the enter 7 surface of the solid cylindrical body '23.'

The dogs 25 are pivotally mounted at their angle upon a common bolt or pin 30, which may be formed removable if so desired. The free lower ends of the arms"28 ;of the dogs 25 are provided with inwardlyextending' teeth '31, which are adapted to engage the lower surface of the conical head 22 of the bit carrier 12. The toothed ends of the dogs 25 are relatively heavier than the arms 29,

so that the toothed ends thereof will be nor-.

mally swung inwardly toward each other, so as to permit the automatic grasping of the head 22 when the implement is lowered thereover.

The upper end of the body 23 is'providedv and with a reduced threaded extension 33, which receives the hollow cap 34. The lower end bore 36, formed in the .cap and the lower end of-this cable is leaded as at 37 so as to prevent the accidental displacement of the same from the cap 34. The hoisting cable 35 forms the means for raising and lowering the body 23.- The solid cylindrical body 23 gives the necessary; weight required to ments 40, and the sections 38 and 39'are notched as at 41, for facilitating the removal placing of the fastening elements in lace.

When it isdesired to lower an imple-' ment, such as the bit carrier :12! in the stem 10, the dogs 25 are placed in engage-- ment with the conical head 22 and the carrier isthen lowered to position by means of a cable 35. When it is desired to release the jaws 25 from the head 22, the member is placed on the hoisting cable 35 and permitted to drop down the same, and it can be'seen that thelower edge of the member 0 will engage'the protruding ends of the of the hoisting cable 35 is extended through a I arms 39 of the dogs 25 and thus swing the dogs. on the pivot pin 30 and move the toothed ends 31 away and out of. engagement with the conical head 22. This is clearly shown in-Figure 2 of the drawings. When it is'desired to raise an implement, such as the bit carrier 12 from a drill stem or a well casing, the heavy body 23 is allowed to drop into the stem and the same will drop over the conical head 22, which will engage the teeth 31 and spread the same against the weight thereof to permit the conical head-to ride past the same. As soon as the conical head rides past the-teeth 31., the

same will move below the head and engage the same, thuspermitting the carrier to be readily raised. The formation of the teeth 31 of the dogs can be varied, for different characters of work, and can be made either relatively long or short, but it is preferred that the lower faces thereof be always bevelled'as at 42 so as to facilitate the swinging thereof.

In figures 6 to 9 inclusive is shown a modified form of the well tool placing and hoisting implement,- and this implement is generally designated by the letter D. A different type of drill which is designated by ,my pending application.

the letter E in these figures is also shown, and this drill forms the subject matter of The drill as shown includes the stem 10, thelower end of which is threaded for the reception of the drill bit holder 51. The stemhas slidably mounted therein the bit carrier 52, which pivotally and slidably supports the bit blades 53. These bit blades are adapted to fit on the annular shoulder 54 formed on the inner surface of the holder 51 when the bit carrier is in its lowermost position, The bit carrier is provided with depending-legs 55, which support the blades 53. The bit carrier 52 and the blades 53 are of a lighter type than that illustrated in Figures 1 to 5 inclusive, and the implement D is more particularly adapted for raising and lowering lighter types of tools and implements, such as the carrier 52. The implement placing and hoisting implement D includes the hoisting cable 56 and has swivelled to its lower end a yoke 57, which pivotally carries the jaws 58,- which includes the substantially parallel arranged legs 59 which have the inwardly extending teeth 60 formed on.their lower ends.- -The upper ends of the legs 59 are provided with inwardly extending crossed arms 61, which are pivotally mounted upon the pin 62, at

their pointof crossing. The upper terminals of the crossed arms 61 end in relatively straight parallel arranged handles 63. The

toothed ends 60 of the jaws 58 are formed relatively heavy and normally'tend to. swing toward each other, so as to automatically engage the conical head 65, which is formed upon the upper end of the stem 66 arranged on the carrier body 52. If so desired, a leaf spring 67 may also be employed for urging the toothed ends 60 of the jaws toward each other, so as to insure the quick engaging of the teeth 60 with the conical head 65.

The means F employed for spreading the teeth 6 0-'when it is desired to release the tool is similar tothe meai1s C shown in Figures l to 5 inclusive, and as shown, this means F consists of a pair of sections 68 and 69, which form a cylinder forsurrounding the hoisting cable 56.

' v hen it isdesired to raise atool, the implement Gr is dropped into the well casing and-the force of impact of the teeth 60 with.

the conical head 65 will spread the same and permit the jaws to grasp the head. The

jaws or teeth 60 are formed relatively broad so as to insure the engagement thereof with the head 65, and the lower-surfaces thereof are also tapered so as to also facilitate this engagement. It is then merely necessary to pull up on the cable 56, and the tool will.

be raised therewith. r

When it is desired to release a tool, the member F is permitted to slide down the 60 in this form may be of any desired size or configuration, best suited for the type of tool, with which the implement is to be utilized. 7 j

, From the foregoing descriptio'n,it-can be seenthat an improved implement has been provided for facilitating the placing and hoisting of implements from drills and well casings, which will permit releasing of the implements or tools, if so desired, and at any. point within-the wellor casing.

Changes in details may be made without departing from the spirit or scope of thi invention, but,

I claim:

'1. A well tool placing and hoisting implement comprising a pair'of pivoted jaws'having toothed ends normally arranged to engage each other, a hoisting cable for the jaws, and means slidably mounted upon said' cable for moving the toothed ends of the jaws away from eachother when so desired. 2. A well tool placing and hoisting implement comprising a body, a hoisting member attached to the body,-a p air of pivotedv jaws secured to the body arranged to normally grasp an article positioned between ticle grasping position.

3. -A well tool placing andhoisting im plement comprising a body, a pair of jaws pivotally secured to the body, toothed ends formed on the jawsarranged to normally, swing'toward eachother, a hoisting cable for-the body, and a sliding weight carried by the hoisting-cable arranged to engage said jaws to move the toothed ends away from each other.

LA well tool placing and hoisting implement comprising a body, a pair of jaws. pivotally secured to thebody, toothed endsformed on the jaws arranged to normally. swing toward each other, and a cylindrical sleeve arranged to slide over'said body and engage said jaws to move said teeth away from each other.

5. The combination with. a drill casingand a tool in the drill casing having a headed stem, of a raising and lowering device for the tool including a body, a pair of pivoted jaws pivotally secured to said body arranged to normally engage said headed stem, a hoisting cable for the body, and a sliding member mounted upon said hoisting cable and arranged toengage said jaws for moving the same away from each other and out of engagement with said headed stem.

.6. The combination with a well casing, a

' tool in said casing having a headed stem, of

a raising and lowering device therefor 'including a pair of pivoted jaws arranged to normally engage said headed stem, and means for moving said j aws away from said headed stem to release said tool at any point desired within said casing.

7. The combination with a tool having a stem, a head on said stem, of a raising and lowering device therefor including a body, a

pair of pivoted jaws carried by the body,

teeth formed on the lower ends of said jaws arranged to normally engage the headed stem, a hoisting cable for the body, and a sleeve slidably mounted upon said cablle and arranged to engage said jaws to move said teeth away from each other.

8. A tool placing and hoisting implement comprising a body having a socket formed -in the lower end thereof, a pair of pivoted jaws mounted in said body arranged to normally swing in said socket, a hoisting cable for the body, teeth formed on the lower ends of the jaws adapted to normally engage l each other, arms formed on the jaws, and .a

,weighted sleeve slidably mounted upon the cable adapted to engage said arms to move the teeth away from each other.

I 9. A tool placing and hoisting implement comprising a solid cylindrical body having 35, a socket formed in the lower end thereof, the

lower end of the socket being flared andhaving an inwardly extending diametrically disposed slot, a pair of pivotedjaws arranged in said slot, teeth formed on the jaws arranged to normally extend into said socket, V outwardly extending crossed arms formed on the jawshaving the terminals thereof extending beyond the outer surface of the :body, and a two part sleeve arranged to be slid down saidc'able into engagement with j ranged to normally swing toward each other,

the outer ends of the uppermost arms being extended beyond said slots and a two-part sleeve slidably mounted upon said; cable and body for engaging said extended terminals of the uppermost arms.

11. A tool placing'and hoisting implement including a yoke, -a pair of jaws including substantially vertically disposed legs, diagonally disposed crossed arms formed on the legs and inwardly extending teeth formed on the lower endsofthe legs, means pivotcrossing to the yoke, a hoisting cable for the yoke, the teeth being normally adapted to abut, and a sliding sleeve mounted upon the cable to engage said downwardly extending arilns to move the teeth away from each ot er.

jaws having vertically disposed legs, diagonally extending crossed arms formed on the upper ends of the legs,-means pivotally connecting the arms at their point of cross- 7 ing to the yoke, upwardly extending vertically disposed handles formed on the upper ends of the arms, inwardly extending teeth formed on the lower ends of the legs, spring means normally urging the teeth toward each other, and a sleeve slidably mounted upon the cable for engaging the arms.

JOHN c. STOKES ally securing. the arms at their po1nt of 12. A grapple including a yoke, a pair of- 

